There are 30 students in a class. 12 of them play basketball, 15 of them play fo

游客2024-01-12 124

问题 There are 30 students in a class. 12 of them play basketball, 15 of them play football, and 19 of them play pingpang. If 7 of them play all three activities and exactly 6 of them play two activities, how many of them play none of the three activities?

选项 A、2
B、0
C、8
D、4
E、6

答案 D

解析设玩三种运动的人分别为A，B，C，A=12，B=15，C=19，7个人三种运动都玩，那么P=7，6个人玩两种运动，那么m=6，代入公式：30=12+15+19-6-2×7+N，得到N=4，选择D。

转载请注明原文地址:https://tihaiku.com/zcyy/3354936.html

相关试题推荐

Inahistoryclassthatconsistedof30students,thenumberofseniorswas3mo
Inagraduatingclassof236students,142tookalgebraand121tookchemistry.
Amongthe900spectatorsatafootballgame,therewasatotalofxstudentsfro
Jimscored95pointsin5basketballgamesforhisschool.Atthisrate,howman
Apollof2,000studentswastakenbeforeCentervilleCollegechangedthenam
Averageexpectedfamilycontribution(EFC)fordependentstudents,
Aschoolbushas10doubleseatsineachof2rows.Twostudentscansitineach
Jimscored95pointsin5basketballgamesforhisschool.Atthisrate,howman
Mr.Hernandez’sstudentsfilledoutasurveyaskinghowmanyhourseachstudent
Asubsandwichandasodaatabasketballgame’sconcessionstandcosts$3.40.A

随机试题

MargauxMallInvitesyouto[img]2019m7x/ct_etoeicrm_etoeicryd_0642_201907[/img]
[img]2011q1/ct_etoeiclj_etoeiclzp_0006_201131[/img][br][originaltext](A)The
[originaltext]W:I’msorry,Mike.Ihavetoputoffourmeetingtillfouro’clo
《不列颠百科全书》向来以（）著称。A.学术性强 B.专指性强 C.权威性高
社会服务机构的资金来源有（）。A.政府资助 B.基金会的慈善捐款
（2019年真题）2016年6月20日，某期货公司挪用客户保证金3亿元，截至20
额外牙最多见的是A.上颌第三磨牙 B.上颌第四磨牙 C.上颌前磨牙区 D.
某机床因订单减少，开工不足，近5年来第一次发生亏损。王厂长由于考虑精简人员，为此
直流电动机的电枢回路KVL方程为()。A. B. C. D.
根据《建设工程工程量清单计价规范》（GB50500-2013），关于施工中工程

最新回复(0)

There are 30 students in a class. 12 of them play basketball, 15 of them play fo

Inahistoryclassthatconsistedof30students,thenumberofseniorswas3mo

Inagraduatingclassof236students,142tookalgebraand121tookchemistry.

Amongthe900spectatorsatafootballgame,therewasatotalofxstudentsfro

Jimscored95pointsin5basketballgamesforhisschool.Atthisrate,howman

Apollof2,000studentswastakenbeforeCentervilleCollegechangedthenam

Averageexpectedfamilycontribution(EFC)fordependentstudents,

Aschoolbushas10doubleseatsineachof2rows.Twostudentscansitineach

Jimscored95pointsin5basketballgamesforhisschool.Atthisrate,howman

Mr.Hernandez’sstudentsfilledoutasurveyaskinghowmanyhourseachstudent

Asubsandwichandasodaatabasketballgame’sconcessionstandcosts$3.40.A

MargauxMallInvitesyouto[img]2019m7x/ct_etoeicrm_etoeicryd_0642_201907[/img]

[img]2011q1/ct_etoeiclj_etoeiclzp_0006_201131[/img][br][originaltext](A)The

[originaltext]W:I’msorry,Mike.Ihavetoputoffourmeetingtillfouro’clo

《不列颠百科全书》向来以（）著称。A.学术性强 B.专指性强 C.权威性高

社会服务机构的资金来源有（）。A.政府资助 B.基金会的慈善捐款

（2019年真题）2016年6月20日，某期货公司挪用客户保证金3亿元，截至20

额外牙最多见的是A.上颌第三磨牙 B.上颌第四磨牙 C.上颌前磨牙区 D.

某机床因订单减少，开工不足，近5年来第一次发生亏损。王厂长由于考虑精简人员，为此

直流电动机的电枢回路KVL方程为()。A. B. C. D.

根据《建设工程工程量清单计价规范》（GB50500-2013），关于施工中工程